1 /* $XConsortium: regionstr.h,v 1.5 89/07/09 15:34:24 rws Exp $ */ 2 /*********************************************************** 3 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts, 4 and the Massachusetts Institute of Technology, Cambridge, Massachusetts. 5 6 All Rights Reserved 7 8 Permission to use, copy, modify, and distribute this software and its 9 documentation for any purpose and without fee is hereby granted, 10 provided that the above copyright notice appear in all copies and that 11 both that copyright notice and this permission notice appear in 12 supporting documentation, and that the names of Digital or MIT not be 13 used in advertising or publicity pertaining to distribution of the 14 software without specific, written prior permission. 15 16 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 17 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL 18 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR 19 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 20 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 21 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 22 SOFTWARE. 23 24 ******************************************************************/ 25 #ifndef REGIONSTRUCT_H 26 #define REGIONSTRUCT_H 27 28 #include "region.h" 29 #include "miscstruct.h" 30 /* 31 * clip region 32 */ 33 34 typedef struct _RegData { 35 long size; 36 long numRects; 37 /* BoxRec rects[size]; in memory but not explicitly declared */ 38 } RegDataRec, *RegDataPtr; 39 40 typedef struct _Region { 41 BoxRec extents; 42 RegDataPtr data; 43 } RegionRec; 44 45 #define REGION_NIL(reg) ((reg)->data && !(reg)->data->numRects) 46 #define REGION_NUM_RECTS(reg) ((reg)->data ? (reg)->data->numRects : 1) 47 #define REGION_SIZE(reg) ((reg)->data ? (reg)->data->size : 0) 48 #define REGION_RECTS(reg) ((reg)->data ? (BoxPtr)((reg)->data + 1) \ 49 : &(reg)->extents) 50 #define REGION_BOXPTR(reg) ((BoxPtr)((reg)->data + 1)) 51 #define REGION_BOX(reg,i) (®ION_BOXPTR(reg)[i]) 52 #define REGION_TOP(reg) REGION_BOX(reg, (reg)->data->numRects) 53 #define REGION_END(reg) REGION_BOX(reg, (reg)->data->numRects - 1) 54 #define REGION_SZOF(n) (sizeof(RegDataRec) + ((n) * sizeof(BoxRec))) 55 56 #endif /* REGIONSTRUCT_H */ 57